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This issue was reported manually by javatlacati. It already has 3 duplicates Build: NetBeans IDE 8.2 RC (Build 201609140952) VM: Java HotSpot(TM) 64-Bit Server VM, 25.45-b02, Java(TM) SE Runtime Environment, 1.8.0_45-b15 OS: Windows 8 User Comments: GUEST: After click on all the left menu item irrelevant right or left click javatlacati: opening nb javatlacati: netbeans closed :( Stacktrace: java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.next(ArrayList.java:851) at org.openide.nodes.NodeLookup$AggregatingExecutor.run(NodeLookup.java:289) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) at java.awt.EventQueue.access$500(EventQueue.java:97)
Created attachment 162565 [details] stacktrace